Penis Sniffer 

A person who sniffs the penis of his/her significant other for fidelity verification.

**This is a "red flag" for lack of trust in a relationshp.

1. Maria tired of always asking Joe where he'd been every time he came home late. She became a "penis sniffer" to confirm her suspicions that Joe was cheating on her. (She also suspected that it Veronica from the accounting department, but first thing first.)

Penis Sniffer by nycapbarista February 28, 2009

penis sniffer 

A term of insult to claim that someone sniffs penises. Better used towards males.

"John you're such a freaking penis sniffer!"

penis sniffer by dei June 18, 2006